Maya says:
Differences between the C++ Maya API and Maya Python API
No MString and MStringArray classes
We have removed the MString and MStringArray classes from the Maya Python API. Python already has a very robust string implementation which makes ours unnecessary.

I am calling the function that was instanced from MFnMesh:
meshFn.createBlindDataType( id0, longNames, shortNames, dataTypes )

Using the type call the following:
id0 = 'int'
longNames, shortNames, and dataTypes are all 'list'